Longman Dictionary of Contemporary English homepage

Date: 1300-1400
Language: Old French
Origin: sourse, from sourdre 'to rise, spring out', from Latin surgere; SURGE1

source

1 noun
     
source1 S2 W1 [countable]
1 a thing, place, activity etc that you get something from:
They get their money from various sources.
source of
a useful source of information
Beans are a very good source of protein.
For me, music is a great source of enjoyment.
major/primary/main source of something
the country's main source of income
energy/food/light source
relatively clean energy sources
at source British English
Is your pension taxed at source (=before it is paid to you)?
2 the cause of something, especially a problem, or the place where it starts
source of
We've found the source of the trouble.
The recent name change has been the source of some confusion.
3TCN a person, book, or document that supplies you with information:
List all your sources at the end of your essay.
I've heard from reliable sources that the company is in trouble.
4SG the place where a stream or river starts
5 technical source code

Dictionary pictures of the day
Do you know what each of these is called?
What is the word for picture 1? What is the word for picture 2? What is the word for picture 3? What is the word for picture 4?
Click on any of the pictures above to find out what it is called.

Explore our topic dictionary